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etiology
原因論

etiology of these diseases is most frequently explained by a lifestyle, unhealthy diet, reduced physical activity.
这些疾病的最常见的病因是生活方式、不健康饮食及体育活动减少。

an in-depth epidemiological investigation focused on the medical response to the alleged victims and on the etiology via the use of clinical and laboratory diagnostic tools.
进行了一次深入的流行病学调查，调查重点是对所述受害人的治疗以及用临床和实验室诊断工具确定病原。

owing to lack of adequate laboratory support, confirmation of diagnosis was limited to a few cases of different etiology, and the mode of transmission could not be verified.
由于没有足够的化验室支助,只能确诊一些病人的不同病因,但无法确定传播的方式。

10.78 in 2006, we commissioned the university of hong kong to conduct a two-year research study on the epidemiology and etiology of suicide and the best practice for suicide prevention in hong kong.
10.78 在2006年，我们委托香港大学进行一项为期两年，有关自杀的流行病学和原因论及在香港防止自杀的最佳方法的研究。

research on the etiology, course and management of mental disorders in women, and probably more important, on the way the nervous system responds to life experiences and to the factors that shape the resilience of women to difficult life circumstances is urgently needed and constitutes a challenge to academia and international organizations.
目前我们急需针对女性心理疾病的病因、病程和管理方面开展研究，也许更重要的是，我们需要研究神经系统对生活经历以及困难生活环境下女性韧性的塑造因素的反应方式，此类研究将对学术界和国际组织构成挑战。

pah is classified into primary pulmonary hypertension (pph) with no etiology, and secondary pulmonary hypertension, which follows certain diseases, including pulmonary embolism and chronic obliterative pulmonary diseases, and progressed pah causes cardiac failure and then death.
pah分为原发性肺动脉高压（pph）和继发性肺动脉高压，原发性肺动脉高压没有病因，而继发性肺动脉高压的病因包括肺栓塞和慢性阻塞性肺部疾病，pah发展后会导致心脏衰竭，然后死亡。